632345561 has 2 divisors, whose sum is σ = 632345562. Its totient is φ = 632345560.

The previous prime is 632345489. The next prime is 632345587. The reversal of 632345561 is 165543236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 624750025 + 7595536 = 24995^2 + 2756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-632345561 is a prime.

It is not a weakly prime, because it can be changed into another prime (632345591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316172780 + 316172781.

It is an arithmetic number, because the mean of its divisors is an integer number (316172781).

Almost surely, 2^632345561 is an apocalyptic number.

It is an amenable number.

632345561 is a deficient number, since it is larger than the sum of its proper divisors (1).

632345561 is an equidigital number, since it uses as much as digits as its factorization.

632345561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 35.

The square root of 632345561 is about 25146.4820800047. The cubic root of 632345561 is about 858.3244648302.

Adding to 632345561 its reverse (165543236), we get a palindrome (797888797).

The spelling of 632345561 in words is "six hundred thirty-two million, three hundred forty-five thousand, five hundred sixty-one".